Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aab71930f1e9d46…

MALICIOUS

PDF

39.6 KB Created: 2020-08-30 22:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e6ff1125998bd27585915f2ed400c9f SHA-1: 7db21c748e79b6fa5b120e61bb4cc44cd434e05c SHA-256: 0aab71930f1e9d46b2ba63c6fd3ca6d10bf8e9eaf1355092c70237ba3cedac4b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL. This suggests an attempt to direct the user to malicious infrastructure, likely for further exploitation or phishing. The presence of numerous Shopify links indicates a link farm strategy to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=density+of+mercury+lb%252F+ft3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/kezokuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5928/files/zatuxare.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/soluwes.pdf
    • https://cdn.shopify.com/s/files/1/0436/1427/3693/files/77542461268.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/31380211887.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/21_sheet_street_surgery_windsor.pdf
    • https://static.usrfiles.com/ugd/b8c837_24701f51696246a39130affad968ae1a.pdf
    • https://static.usrfiles.com/ugd/bae363_7df976bab93844b4921eebd8e9d3a9ed.pdf
    • https://static.usrfiles.com/ugd/dd4472_6ff0a37d66f74b59afb0e15c6035fb46.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://static.usrfiles.com/ugd/5b5da7_535bf3befadd4a4db4ef3c9f9fa39724.pdf
    • https://static.usrfiles.com/ugd/b8c837_98fc5aa7399b4310be49e70d6ba902a8.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_eac635c8ac0b4de5a894c82b6d3b9b60.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b82.bin
8e280427dafeb6b69c0d1e7c48bba79fb4d6ef694a005bcb9ef80bf86494e209
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 5260 bytes
font_01_sfnt_off00006d63.bin
23082326ad5acb4165ff1e29aa8a02dfce0fd813a5d5738a49ec87709fcbdde6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D63 10124 bytes